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https://www.readbyqxmd.com/read/29684853/naringenin-improve-hepatitis-c-virus-infection-induced-insulin-resistance-by-increase-pten-expression-via-p53-dependent-manner
#1
Benli Jia, Dongsheng Yu, Gang Yu, Yunsheng Cheng, Yang Wang, Xiaoqiang Yi, Xiaoping Li, Yong Wang
Hepatitis C virus (HCV) infection may finally lead to hepatocellular carcinoma (HCC), and also associated with insulin resistance (IR). Naringenin (NGEN), a flavonoid found in grapefruit, has anti-virus, anti-inflammation and insulin sensitization effects. In the present study we examined the effects of NGEN on HCV core protein (HCVCP) infection induced IR and investigated the mechanism involved. We found that NGEN ameliorated IR and glucose tolerance in HCVCP infected mice by increase the phosphorylation of Akt at both Ser473 and Thr308 site, and also inhibited the inflammation cytokine production and T-cell immune response...
April 20, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29684812/quantitative-evaluation-of-the-matrix-effect-in-bioanalytical-methods-based-on-lc-ms-a-comparison-of-two-approaches
#2
Piotr J Rudzki, Elżbieta Gniazdowska, Katarzyna Buś-Kwaśnik
Liquid chromatography coupled to mass spectrometry (LC-MS) is a powerful tool for studying pharmacokinetics and toxicokinetics. Reliable bioanalysis requires the characterization of the matrix effect, i.e. influence of the endogenous or exogenous compounds on the analyte signal intensity. We have compared two methods for the quantitation of matrix effect. The CVs(%) of internal standard normalized matrix factors recommended by the European Medicines Agency were evaluated against internal standard normalized relative matrix effects derived from Matuszewski et al...
April 6, 2018: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29684787/the-body-electric-2-0-recent-advances-in-developmental-bioelectricity-for-regenerative-and-synthetic-bioengineering
#3
REVIEW
Juanita Mathews, Michael Levin
Breakthroughs in biomedicine and synthetic bioengineering require predictive, rational control over anatomical structure and function. Recent successes in manipulating cellular and molecular hardware have not been matched by progress in understanding the patterning software implemented during embryogenesis and regeneration. A fundamental capability gap is driving desired changes in growth and form to address birth defects and traumatic injury. Here we review new tools, results, and conceptual advances in an exciting emerging field: endogenous non-neural bioelectric signaling, which enables cellular collectives to make global decisions and implement large-scale pattern homeostasis...
April 20, 2018: Current Opinion in Biotechnology
https://www.readbyqxmd.com/read/29684772/identification-of-mir-22-3p-mir-92a-3p-and-mir-137-in-peripheral-blood-as-biomarker-for-schizophrenia
#4
Jie Ma, Shanshan Shang, Jihan Wang, Tianbu Zhang, Fayi Nie, Xiaobin Song, Heping Zhao, Chunhui Zhu, Rui Zhang, Dingjun Hao
MicroRNAs (miRNAs) are a class of endogenous and non-coding single-stranded RNAs with length of about 22 nucleotides, and many are evolutionarily conserved. Although postmortem brain samples provide direct evidence of miRNA dysregulation within the brain, peripheral tissue samples can be obtained from living subjects and have the potential to yield biomarkers that could be used as diagnostic tools. To verify and detect additional miRNAs differentially expressed in peripheral blood and further explore their diagnostic value and function for schizophrenia, we performed a next-generation sequencing approach in combination with a literature search to select appropriate miRNAs...
April 7, 2018: Psychiatry Research
https://www.readbyqxmd.com/read/29684595/apelin-and-elabela-toddler-double-ligands-for-apj-apelin-receptor-in-heart-development-physiology-and-pathology
#5
Keiji Kuba, Teruki Sato, Yumiko Imai, Tomokazu Yamaguchi
Apelin is an endogenous peptide ligand for the G protein-coupled receptor APJ/AGTRL1/APLNR and is widely expressed throughout human body. In adult hearts Apelin-APJ/Apelin receptor axis is potently inotropic, vasodilatory, and pro-angiogenic and thereby contributes to maintaining homeostasis in normal and pathological hearts. Apelin-APJ/Apelin receptor is also involved in heart development including endoderm differentiation, heart morphogenesis, and coronary vascular formation. APJ/Apelin receptor had been originally identified as an orphan receptor for its sequence similarity to Angiotensin II type 1 receptor, and it was later deorphanized by identification of Apelin in 1998...
April 20, 2018: Peptides
https://www.readbyqxmd.com/read/29684590/a-synthetic-snake-venom-based-tripeptide-glu-val-trp-protects-pc12-cells-from-mpp-toxicity-by-activating-the-ngf-signaling-pathway
#6
Carolina P Bernardes, Neife A G Santos, Flavia M Sisti, Rafaela Scalco Ferreira, Norival A Santos-Filho, Adélia C O Cintra, Eduardo M Cilli, Suely V Sampaio, Antonio C Santos
Venom small peptides that target neurotrophin receptors might be beneficial in neurodegeneration, including Parkinsońs disease (PD). Their small size, ease of synthesis, structural stability and target selectivity make them important tools to overcome the limitations of endogenous neurotrophins as therapeutic agents. Additionally, they might be optimized to improve resistance to enzymatic degradation, bioavailability, potency and, mainly, lipophilicity, important to cross the blood brain barrier (BBB). Here, we evaluated the neuroprotective effects and mechanisms of the synthetic snake-venom-based peptide p-BTX-I (Glu-Val-Trp) in PC12 cells treated with MPP+ (1-methyl-4-phenylpyridinium), a dopaminergic neurotoxin that induces Parkinsonism in vivo...
April 20, 2018: Peptides
https://www.readbyqxmd.com/read/29684493/evidence-of-similar-protective-effects-afforded-by-white-tea-and-its-active-component-egcg-on-oxidative-stress-mediated-hepatic-dysfunction-during-benzo-a-pyrene-induced-toxicity
#7
Sangeeta Rangi, Sunil Kumar Dhatwalia, Priti Bhardwaj, Manoj Kumar, D K Dhawan
The present study was conducted to unravel the comparative efficacy of White Tea (WT) and Epigallocatechin gallate (EGCG) in affording protection against benzo (a) pyrene (BaP) induced hepatotoxicity. The animals were randomly divided into six groups viz., normal control (NC), BaP, EGCG, WT, WT + BaP and EGCG + BaP treated. 50 mg/kg of BaP was given orally twice a week for 4 weeks. WT extract (1%) and EGCG (1% WT equivalent) were given on alternate days for 12 weeks (4 weeks prior, during and after BaP treatment)...
April 20, 2018: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29684464/tracking-single-membrane-targets-of-human-autoantibodies-using-single-nanoparticle-imaging
#8
Julie Jézéquel, Julien P Dupuis, François Maingret, Laurent Groc
BACKGROUND: Over the past decade, an increasing number of neurological and neuropsychiatric diseases have been associated with the expression of autoantibodies directed against neuronal targets, including neurotransmitter receptors. Although cell-based assays are routinely used in clinics to detect the presence of immunoglobulins, such tests often provide heterogeneous outcomes due to their limited sensitivity, especially at low titers. Thus, there is an urging need for new methods allowing the detection of autoantibodies in seropositive patients that cannot always be clinically distinguished from seronegative ones...
April 20, 2018: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/29684406/conservation-of-cardiac-l-type-ca-2-channels-and-their-regulation-in-drosophila-a-novel-genetically-pliable-channelopathic-model
#9
Worawan B Limpitikul, Meera C Viswanathan, Brian O'Rourke, David T Yue, Anthony Cammarato
Dysregulation of L-type Ca2+ channels (LTCCs) underlies numerous cardiac pathologies. Understanding their modulation with high fidelity relies on investigating LTCCs in their native environment with intact interacting proteins. Such studies benefit from genetic manipulation of endogenous channels in cardiomyocytes, which often proves cumbersome in mammalian models. Drosophila melanogaster, however, offers a potentially efficient alternative as it possesses a relatively simple heart, is genetically pliable, and expresses well-conserved genes...
April 20, 2018: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29684399/a-cas9-transgenic-plasmodium-yoelii-parasite-for-efficient-gene-editing
#10
Pengge Qian, Xu Wang, Zhenke Yang, Zhenkui Li, Han Gao, Xin-Zhuan Su, Huiting Cui, Jing Yuan
The RNA-guided endonuclease Cas9 has applied as an efficient gene-editing method in malaria parasite Plasmodium. However, the size (4.2 kb) of the commonly used Cas9 from Streptococcus pyogenes (SpCas9) limits its utility for genome editing in the parasites only introduced with cas9 plasmid. To establish the endogenous and constitutive expression of Cas9 protein in the rodent malaria parasite P. yoelii, we replaced the coding region of an endogenous gene sera1 with the intact SpCas9 coding sequence using the CRISPR/Cas9-mediated genome editing method, generating the cas9-knockin parasite (PyCas9ki) of the rodent malaria parasite P...
April 20, 2018: Molecular and Biochemical Parasitology
https://www.readbyqxmd.com/read/29684364/inhibition-of-mitochondrial-fission-preserves-photoreceptors-after-retinal-detachment
#11
Xiangjun She, Xinmin Lu, Tong Li, Junran Sun, Jian Liang, Yuanqi Zhai, Shiqi Yang, Qing Gu, Fang Wei, Hong Zhu, Fenghua Wang, Xueting Luo, Xiaodong Sun
Photoreceptor degeneration is a leading cause of visual impairment worldwide. Separation of neurosensory retina from the underlying retinal pigment epithelium is a prominent feature preceding photoreceptor degeneration in a variety of retinal diseases. Although ophthalmic surgeries have been well developed to restore retinal structures, post-op patients usually experience progressive photoreceptor degeneration and irreversible vision loss that is incurable at present. Previous studies point to a critical role of mitochondria-mediated apoptotic pathway in photoreceptor degeneration, but the upstream triggers remain largely unexplored...
April 20, 2018: American Journal of Pathology
https://www.readbyqxmd.com/read/29684359/the-g-protein-coupled-receptor-alx-fpr2-regulates-adaptive-immune-responses-in-mouse-submandibular-glands
#12
Ching-Shuen Wang, Olga J Baker
ALX/FPR2 is a G-protein-coupled receptor that has multiple binding partners, including the endogenous lipid mediators resolvin D1 (RvD1), lipoxin A4 (LXA4 ), and the Ca2+ -dependent phospholipid-binding protein Annexin A1. Previous studies demonstrated that RvD1 activates ALX/FPR2 to resolve salivary gland inflammation in the NOD/ShiLtJ mouse model for Sjögren's syndrome. Moreover, mice lacking the ALX/FPR2 display an exacerbated salivary gland inflammation in response to lipopolysaccharide. Additionally, activation of ALX/FPR2 has been shown to be important for regulating antibody production in B cells...
April 20, 2018: American Journal of Pathology
https://www.readbyqxmd.com/read/29684347/developmental-endothelial-locus-1-prevents-development-of-peritoneal-adhesions-in-mice
#13
Yan Fu, Jiaywei Tsauo, Yucheng Sun, Zhe Wang, Kun Yung Kim, Seung-Hwan Lee, Dong-Young Kim, Feifeng Jing, Dahae Lim, Ho-Young Song, Hoon Hyun, Eun Young Choi
Postoperative peritoneal adhesions, fibrous bands formed in the peritoneal cavity following surgery, represent a common, challenging and costly problem faced by surgeons and patients, for which effective therapeutic options are lacking. Since aberrant inflammation is one of the key mechanisms underlying peritoneal adhesion formation, here we set out to study the role of developmental endothelial locus-1 (Del-1), which has been recently identified as an endogenous inhibitor of inflammation, in the formation of postoperative peritoneal adhesions using a mouse model of peritoneal adhesions induced by ischemic buttons...
April 20, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29684277/immunopet-imaging-of-endogenous-and-transfected-prolactin-receptor-tumor-xenografts
#14
Sarah M Cheal, Shutian Ruan, Darren R Veach, Valerie A Longo, Blesida J Punzalan, Jiong Wu, Edward K Fung, Marcus P Kelly, Jessica R Kirshner, Jason T Giurleo, George Ehrlich, Amy Q Han, Gavin Thurston, William C Olson, Pat B Zanzonico, Steven M Larson, Jorge A Carrasquillo
OBJECTIVE: Antibodies labeled with positron-emitting isotopes have been used for tumor detection, predicting which patients may respond to tumor antigen-directed therapy, and assessing pharmacodynamic effects of drug interventions. Prolactin receptor (PRLR) is overexpressed in breast and prostate cancers and is a new target for cancer therapy. We evaluated REGN2878, an anti-PRLR monoclonal antibody, as an immunoPET reagent. METHODS: REGN2878 was labeled with Zr-89 after conjugation with desferrioxamine B or labeled with I-131/I-124...
April 23, 2018: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29684207/the-number-of-titrated-microrna-species-dictates-cerna-regulation
#15
Hua-Sheng Chiu, María Rodríguez Martínez, Elena V Komissarova, David Llobet-Navas, Mukesh Bansal, Evan O Paull, José Silva, Xuerui Yang, Pavel Sumazin, Andrea Califano
microRNAs (miRNAs) play key roles in cancer, but their propensity to couple their targets as competing endogenous RNAs (ceRNAs) has only recently emerged. Multiple models have studied ceRNA regulation, but these models did not account for the effects of co-regulation by miRNAs with many targets. We modeled ceRNA and simulated its effects using established parameters for miRNA/mRNA interaction kinetics while accounting for co-regulation by multiple miRNAs with many targets. Our simulations suggested that co-regulation by many miRNA species is more likely to produce physiologically relevant context-independent couplings...
April 19, 2018: Nucleic Acids Research
https://www.readbyqxmd.com/read/29684051/estimating-genetic-kin-relationships-in-prehistoric-populations
#16
Jose Manuel Monroy Kuhn, Mattias Jakobsson, Torsten Günther
Archaeogenomic research has proven to be a valuable tool to trace migrations of historic and prehistoric individuals and groups, whereas relationships within a group or burial site have not been investigated to a large extent. Knowing the genetic kinship of historic and prehistoric individuals would give important insights into social structures of ancient and historic cultures. Most archaeogenetic research concerning kinship has been restricted to uniparental markers, while studies using genome-wide information were mainly focused on comparisons between populations...
2018: PloS One
https://www.readbyqxmd.com/read/29683732/lncrna-pfal-promotes-lung-fibrosis-through-ctgf-by-competitively-binding-mir-18a
#17
Xuelian Li, Tong Yu, Huitong Shan, Hua Jiang, Jian Sun, Xiaoguang Zhao, Wei Su, Lida Yang, Hongli Shan, Haihai Liang
Idiopathic pulmonary fibrosis (IPF) is a chronic, progressive, fibrotic parenchymal lung disease of unknown etiology and lacks an effective intervention. Long noncoding RNAs (lncRNAs) participate in organ fibrosis and various pulmonary diseases, but the role of lncRNAs in lung fibrosis is not fully understood. In the present study, we identified that lncRNA NONMMUT021928, designated as pulmonary fibrosis-associated lncRNA (PFAL), was up-regulated in the lungs of mice with experimental lung fibrosis, and in TGF-β1-induced fibrotic lung fibroblasts...
April 23, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29683506/noncoding-rnas-in-ischemic-stroke-time-to-translate
#18
REVIEW
Harpreet Kaur, Deepaneeta Sarmah, Jackson Saraf, Kanchan Vats, Kiran Kalia, Anupom Borah, Dileep R Yavagal, Kunjan R Dave, Zhumur Ghosh, Pallab Bhattacharya
Stroke is devastating and a major cause of morbidity and mortality around globe. Current interventions for ischemic stroke include thrombolytics, clot retrieval devices and/or intravenous tissue plasminogen activators (tPA), the latter two becoming the first line of treatment. Owing to the limitations of tPA to elicit therapeutic benefits in a narrow time window, new pharmacological interventions are needed. Exploring noncoding RNAs (ncRNAs) may be a promising option for stroke treatment. ncRNAs are endogenous molecules that play key roles in the pathophysiology of many functions and diseases, including during ischemic stroke...
April 23, 2018: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/29683461/utilizing-high-resolution-ultrasound-to-monitor-tumor-onset-and-growth-in-genetically-engineered-pancreatic-cancer-models
#19
Robert-Guenther Goetze, Soeren M Buchholz, Shilpa Patil, Golo Petzold, Volker Ellenrieder, Elisabeth Hessmann, Albrecht Neesse
The LSL-KrasG12D/+ ; LSL-Trp53R172H/+ ; Pdx-1-Cre (KPC) mouse model represents an established and frequently used transgenic model to evaluate novel therapies in pancreatic cancer. Tumor onset is variable in the KPC model between 8 weeks and several months. Therefore, non-invasive imaging tools are required to screen for tumor onset and monitor for response to treatment. To address this issue, different approaches have emerged over the last years. High resolution ultrasound has major advantages such as non-invasiveness, fast session times and a high image resolution without radiation exposure...
April 7, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29683460/quantification-of-site-specific-protein-lysine-acetylation-and-succinylation-stoichiometry-using-data-independent-acquisition-mass-spectrometry
#20
Lei Wei, Jesse G Meyer, Birgit Schilling
Post-translational modification (PTM) of protein lysine residues by NƐ-acylation induces structural changes that can dynamically regulate protein functions, for example, by changing enzymatic activity or by mediating interactions. Precise quantification of site-specific protein acylation occupancy, or stoichiometry, is essential for understanding the functional consequences of both global low-level stoichiometry and individual high-level acylation stoichiometry of specific lysine residues. Other groups have reported measurement of lysine acetylation stoichiometry by comparing the ratio of peptide precursor isotopes from endogenous, natural abundance acylation and exogenous, heavy isotope-labeled acylation introduced after quantitative chemical acetylation of proteins using stable isotope-labeled acetic anhydride...
April 4, 2018: Journal of Visualized Experiments: JoVE
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